M3 says to avoid an icon in a snackbar and gives the supporting text no fourth
colour, so the state glyph and the 80% description are gone: a type now only
picks the announcement role. The 40px action and close buttons take the shared
touch-target, Escape dismisses a snackbar that holds the focus, and the host
publishes --material-snackbar-height on <html> so a `fab` button sits above the
snackbar instead of under it. Plan step 18, actions.md ACT-17, ACT-18, ACT-20,
ACT-34, ACT-35.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
